151 lines
3.7 KiB
C++
151 lines
3.7 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#include "ui/effects/widget_fade_wrap.h"
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namespace Ui {
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FadeAnimation::FadeAnimation(TWidget *widget) : _widget(widget) {
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}
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bool FadeAnimation::paint(Painter &p) {
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if (_cache.isNull()) return false;
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auto opacity = _animation.current(getms(), _visible ? 1. : 0.);
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p.setOpacity(opacity);
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p.drawPixmap(0, 0, _cache);
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return true;
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}
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void FadeAnimation::refreshCache() {
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if (!_cache.isNull()) {
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_cache = QPixmap();
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_cache = myGrab(_widget);
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}
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}
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void FadeAnimation::setFinishedCallback(FinishedCallback &&callback) {
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_finishedCallback = std::move(callback);
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}
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void FadeAnimation::setUpdatedCallback(UpdatedCallback &&callback) {
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_updatedCallback = std::move(callback);
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}
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void FadeAnimation::show() {
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_visible = true;
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stopAnimation();
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}
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void FadeAnimation::hide() {
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_visible = false;
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stopAnimation();
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}
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void FadeAnimation::stopAnimation() {
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_animation.finish();
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if (!_cache.isNull()) {
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_cache = QPixmap();
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updateCallback();
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if (_visible) {
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_widget->showChildren();
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}
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if (_finishedCallback) {
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_finishedCallback();
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}
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}
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if (_visible == _widget->isHidden()) {
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_widget->setVisible(_visible);
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}
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}
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void FadeAnimation::fadeIn(int duration) {
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if (_visible) return;
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_visible = true;
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startAnimation(duration);
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}
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void FadeAnimation::fadeOut(int duration) {
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if (!_visible) return;
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_visible = false;
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startAnimation(duration);
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}
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void FadeAnimation::startAnimation(int duration) {
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if (_cache.isNull()) {
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_widget->showChildren();
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_cache = myGrab(_widget);
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_widget->hideChildren();
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}
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auto from = _visible ? 0. : 1.;
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auto to = _visible ? 1. : 0.;
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_animation.start([this]() { updateCallback(); }, from, to, duration);
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updateCallback();
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if (_widget->isHidden()) {
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_widget->show();
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}
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}
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void FadeAnimation::updateCallback() {
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if (_animation.animating()) {
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_widget->update();
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if (_updatedCallback) {
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_updatedCallback(_animation.current(_visible ? 1. : 0.));
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}
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} else {
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stopAnimation();
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}
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}
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WidgetFadeWrap<TWidget>::WidgetFadeWrap(QWidget *parent
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, object_ptr<TWidget> entity
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, int duration
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, base::lambda<void()> updateCallback) : TWidget(parent)
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, _entity(std::move(entity))
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, _duration(duration)
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, _updateCallback(std::move(updateCallback))
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, _animation(this) {
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_animation.show();
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if (_updateCallback) {
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_animation.setFinishedCallback([this] { _updateCallback(); });
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_animation.setUpdatedCallback([this](float64 opacity) { _updateCallback(); });
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}
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_entity->setParent(this);
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_entity->moveToLeft(0, 0);
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_entity->installEventFilter(this);
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resize(_entity->size());
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}
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bool WidgetFadeWrap<TWidget>::eventFilter(QObject *object, QEvent *event) {
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if (object == _entity && event->type() == QEvent::Resize) {
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resize(_entity->rect().size());
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}
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return TWidget::eventFilter(object, event);
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}
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void WidgetFadeWrap<TWidget>::paintEvent(QPaintEvent *e) {
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Painter p(this);
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_animation.paint(p);
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}
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} // namespace Ui
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